<template>
  <div class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">硅谷外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on: loginWay}" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{on: !loginWay}" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form @submit.prevent="login">
          <div :class="{on: loginWay}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone">
              <button :disabled="!rightPhone" class="get_verification" :class="{right_phone: rightPhone}"
                      @click.prevent="getCode">
                {{computeTime>0 ? `已发送（${computeTime}s）` : '获取验证码'}}
              </button>
            </section>
            <section class="login_verification">
              <input type="tel" maxlength="8" placeholder="验证码" v-model="code">
            </section>
            <section class="login_hint">
              温馨提示： 未注册硅谷外卖帐号的手机号， 登录时将自动注册， 且代表已同意
              <a href="javascript:;">《用户服务协议》 </a>
            </section>
          </div>
          <div :class="{on: !loginWay}">
            <section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
              </section>
              <section class="login_verification">
                <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd">
                <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd">
                <div class="switch_button" @click="showPwd=!showPwd" :class="showPwd ? 'on' : 'off'">
                  <div class="switch_circle" :class="{right: showPwd}"></div>
                  <span class="switch_text">{{showPwd ? 'abc' : ''}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                <img class="get_verification" src="http://localhost:4000/captcha" alt="captcha"
                     @click.prevent="getCaptcha" ref="captcha">
              </section>
            </section>
          </div>
          <button class="login_submit">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <span href="javascript:" class="go_back" @click="$router.back()">
        <i class="iconfont icon-jiantou2"></i>
      </span>
    </div>
    <alert-tip v-show="alertShow" :alertText="alertText" @closeTip="closeTip"></alert-tip>
  </div>
</template>

<script>
  import AlertTip from '../../components/AlertTip/AlertTip'
  import {reqPwdLogin, reqSendCode, reqSmsLogin} from '../../api/index'
  import {Toast} from 'mint-ui'

  export default {
    name: "Login",
    data() {
      return {
        loginWay: true, // true表示短信登录，false表示密码登录
        phone: '', //手机号
        code: '', //短信验证码
        pwd: '', //密码
        name: '', //用户名
        captcha: '', //图形验证码
        computeTime: 0, //计时的时间
        showPwd: false, //是否显示密码
        alertText: '', //提示文本
        alertShow: false, //是否显示提示框
      }
    },
    computed: {
      rightPhone() {
        return /^1\d{10}$/.test(this.phone);
      }
    },
    methods: {
      // 异步获取短信验证码
      async getCode() {
        // 当前没有计时，才进入
        if (!this.computeTime) {
          // 启动倒计时
          this.computeTime = 30;
          const intervalId = setInterval(() => {
            this.computeTime--;
            if (this.computeTime <= 0) {
              // 停止计时
              clearInterval(intervalId);
            }
          }, 1000);
          // 发送ajax请求（向指定手机号发送验证码）
          const result = await reqSendCode(this.phone);
          if (result.code === 1) {
            // 显示提示
            this.showAlert(result.msg);
            // 停止倒计时
            if (this.computeTime) {
              this.computeTime = 0;
              clearInterval(this.intervalId);
              this.intervalId = undefined;
            }
          }
        }
      },
      // 异步登录
      async login() {
        let result;
        // 前台表单验证
        if (this.loginWay) {
          const {rightPhone, phone, code} = this;
          if (!rightPhone) {
            //手机号不正确
            this.showAlert("手机号不正确！");
            return;
          } else if (!/^\d{6}$/.test(code)) {
            //验证码必须是6位数字
            this.showAlert("验证码必须是6位数字！");
            return;
          }
          // 发送ajax请求短信登录
          result = await reqSmsLogin(phone, code);
        } else {
          const {name, pwd, captcha} = this;
          if (!name) {
            //用户名必须指定
            this.showAlert("用户名必须指定！");
            return;
          } else if (!pwd) {
            //密码必须指定
            this.showAlert("密码必须指定！");
            return;
          } else if (!captcha) {
            //验证码必须指定
            this.showAlert("验证码必须指定！");
            return;
          }
          // 发送ajax请求密码登录
          result = await reqPwdLogin(name, pwd, captcha);
        }

        // 停止倒计时
        if (this.computeTime) {
          this.computeTime = 0;
          clearInterval(this.intervalId);
          this.intervalId = undefined;
        }
        // 根据结果数据处理
        if (result.code == 0) {
          this.userInfo = result.data;
          if (!this.userInfo._id) {
            this.showAlert(userInfo.msg);
          } else {
            // 将user保存在vuex的state中
            this.$store.dispatch('recordUserInfo', this.userInfo)
            Toast({
              message: '登录成功！',
              iconClass: 'mintui mintui-success',
              duration: 2000
            });
            setTimeout(fn => {
              // 跳转路由到个人中心界面
              this.$router.replace('/profile');
              if (!this.loginWay) {
                this.getCaptcha()
              }
            }, 2000);
          }
        } else {
          this.showAlert(result.msg);
          // 重新获取验证码
          if (!this.loginWay) {
            this.getCaptcha()
          }
        }
      },
      // 显示警告框
      showAlert(alertText) {
        this.alertText = alertText;
        this.alertShow = true;
      },
      // 关闭警告框
      closeTip() {
        this.alertText = "";
        this.alertShow = false;
      },
      // 切换验证码
      getCaptcha() {
        //每次点击的src要不一样
        this.$refs.captcha.src = 'http://localhost:4000/captcha?time=' + Date.now();
        this.captcha = '';
      },
    },
    components: {
      AlertTip
    }
  }
</script>

<style lang="stylus" ref="stylesheet/stylus" scoped>
  @import "../../common/stylus/mixins.styl"
  .loginContainer
    width 100%
    height 100%
    background #fff
    .loginInner
      padding-top 60px
      width 80%
      margin 0 auto
      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color #02a774
          text-align center
        .login_header_title
          padding-top 40px
          text-align center
          > a
            color #333
            font-size 14px
            padding-bottom 4px
            &:first-child
              margin-right 40px
            &.on
              color #02a774
              font-weight 700
              border-bottom 2px solid #02a774
      .login_content
        > form
          > div
            display none
            &.on
              display block
            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial
              &:focus
                border 1px solid #02a774
            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent
                &.right_phone
                  color black
            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s, border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                &.off
                  background #fff
                  .switch_text
                    float right
                    color #ddd
                &.on
                  background #02a774
                > .switch_circle
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0, 0, 0, .1)
                  transition transform .3s
                  &.right
                    transform translateX(27px)
            // 向右移动
            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px
              > a
                color #02a774
          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #4cd96f
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0
        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999
      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px
        > .iconfont
          font-size 20px
          color #999
</style>
